George Dobson, Jordan Willis, Laurens De Bock and Marc McNulty are just some of the names Jack Ross has signed to try and bolster his squad as the Black Cats target promotion back to the Championship at the second attempt.
Here, we round-up the figures – including incoming and outgoing players - who have won and lost as a result of the Black Cats’ transfer business. Scroll down and click through the pages to see our Sunderland AFC summer window winners and losers.
. SUNDERLAND, ENGLAND - DECEMBER 02: Robbin Ruiter of Sunderland during the Sky Bet Championship match between Sunderland and Reading at Stadium of Light on December 2, 2017 in Sunderland, England. (Photo by Nigel Roddis/Getty Images,)
Robbin Ruiter in action during his Sunderland days/ | Getty Images Photo: Nigel Roddis
. Dylan McGeouch - loser
The Scottish midfielder remains at Sunderland but faces competition from George Dobson, Grant Leadbitter, Max Power, Elliot Embleton and Luke O'Nien. | JPIMedia Photo: FRANK REID
. Jack Baldwin - winner (?)
The defender could still sign for Salford City on loan in League Two after the deadline if a deal sheet has been submitted, potentially becoming the latest piece in an exciting project led by Manchester United's Class of '92. | Getty Images Photo: Jan Kruger
5. Donald Love - winner
After a disastrous spell with Sunderland, Love joined Shrewsbury Town following his release from the North East team. The ex-Manchester United man has been hailed as 'terrific' by new manager Sam Ricketts. | JPIMedia Photo: JPIMedia
6. Glenn Loovens - loser
The defender admitted his legs had gone but claimed he'd have liked to stay on at Sunderland in some capacity. Unfortunately for Loovens, the one-time Holland international didn't get his wish as player and club parted ways. | Getty Images Photo: Naomi Baker
7. Lee Cattermole - winner
The ex-captain achieved his dream of playing abroad after joining VVV-Venlo. | Getty Images Photo: Bryn Lennon
8. Robbin Ruiter - winner
After a disappointing two-season stay at Sunderland, Ruiter joined Dutch giants PSV and appeared in Champions League qualifying. | Getty Images Photo: Nigel Roddis